[Android-development] Android Splash Screen

[Liang Jian]

     Hi Ben Lau,
     You are right, with both methods applied the flicker will be minimal.
I think now the flicker may be related to the creation of EGL surface, I
will do more investigation into it.

On Sun, Nov 1, 2015 at 9:05 PM, Ben Lau <xbenlau at gmail.com> wrote:

> Hi Liang Jian,
>
> I mean to mix your method (custom AndroidStyle) together with
>  android.app.splash_screen_drawable. It should have no impact for splash
> screen loading time. It can be shown immediately after clicked to start the
> application.
>
> However, for the flicker problem,yes , it still exists. But I think it is
> less obvious then custom AndroidStyle only. I need to be focused on screen
> change to discover the flicker.
>
> From my understanding, the splash screen change process can be divided
> into 3 steps:
>
> 1. Render window background and title bar according to theme.
>
> 2. QtActivity.onCreate(Bundle)
>
> If android.app.splash_screen_drawable is set, it will render the drawable.
> Otherwise, it will clear window background to #ff000000.
>
> 3. QQmlEngine loads the first scene and start rendering.
>
> If your don't set android.app.splash_screen_drawable, both of step 2 and 3
> will first render a black screen, but their timing are different. Step 3 is
> short and less obvious.
>
>
>
>
> On 1 November 2015 at 20:36, Liang Jian <jianliang79 at gmail.com> wrote:
>
>>     To Ben Lau: I have tried this method in the past, but that will also
>> cause the flicker issue, and the most important is: with this method, It
>> will take very long time before the splash screen show up after I click to
>> start the app.
>>
>> On Sun, Nov 1, 2015 at 2:25 PM, Ben Lau <xbenlau at gmail.com> wrote:
>>
>>>
>>> I have a suggestion. Based on the method from Liang Jian. Add the
>>> following line to AndroidManifest.xml:
>>>
>>>             <meta-data android:name="android.app.splash_screen_drawable" android:resource="@drawable/icon"/>
>>>
>>>
>>> The "android:resource" should point to the same file like your
>>> MyAndroidStyle.
>>>
>>> Will that fix the problem?
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> On 1 November 2015 at 09:40, Liang Jian <jianliang79 at gmail.com> wrote:
>>>
>>>>     I think we have encountered the same problem, the flicker I have
>>>> mentioned is the black screen between splash screen and the first qml page
>>>> :-)
>>>>
>>>> On Fri, Oct 30, 2015 at 11:23 PM, Bruno Tezine <btezine at gmail.com>
>>>> wrote:
>>>>
>>>>> Hi Liang Jian,
>>>>> Thank you for your response.
>>>>> I already tried to use this approach. You complain about a flicker,
>>>>> but what about the black screen between the splash and the first qml page?
>>>>> I don't know if this happened with you, but under my tests, the splash
>>>>> screen appears ok, but then the screen goes black for a while until the
>>>>> main qml page is loaded.
>>>>> Does it happen with you?
>>>>> Kind regards,
>>>>>    Bruno.
>>>>>
>>>>>
>>>>> 2015-10-30 12:11 GMT-02:00 Liang Jian <jianliang79 at gmail.com>:
>>>>>
>>>>>>      According to my experience, the best way to show splash screen
>>>>>> in qt-android is to use a custom android theme and set its
>>>>>> android:windowBackground. In this way the splash screen will show instantly
>>>>>> after you click to launch your app. But unfortunately there is an annoying
>>>>>> bug about this method, please refer to
>>>>>> https://bugreports.qt.io/browse/QTBUG-43558
>>>>>>
>>>>>> On Thu, Oct 29, 2015 at 9:06 PM, Bruno Tezine <btezine at gmail.com>
>>>>>> wrote:
>>>>>>
>>>>>>> Hi,
>>>>>>> How can I create a splash screen for Android using Qt (without
>>>>>>> widgets)?
>>>>>>> I don't know if it's possible. The idea is to present a splash
>>>>>>> screen(image) immediately while the first qml page is loading. No timers
>>>>>>> involved.
>>>>>>> I have read several samples, but none seems to fit. Let me explain:
>>>>>>>
>>>>>>> 1) http://doc.qt.io/qt-5/qtquick-window-example.html
>>>>>>> --This example uses a timer. It doesn't display a splash while the
>>>>>>> app is still loading the first screen.
>>>>>>>
>>>>>>> 2)
>>>>>>> http://stackoverflow.com/questions/5486789/how-do-i-make-a-splash-screen
>>>>>>> --It explains how to create splash screens using two approaches. One
>>>>>>> using an Activity and other using a theme style. The first approach uses a
>>>>>>> timer and delays the app load. The second quickly display a splash, but
>>>>>>> after it disappears, the screen goes black while loading the first qml
>>>>>>> page.
>>>>>>>
>>>>>>> Is it possible?
>>>>>>> Thank you,
>>>>>>>    Bruno.
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> Android-development mailing list
>>>>>>> Android-development at qt-project.org
>>>>>>> http://lists.qt-project.org/mailman/listinfo/android-development
>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>
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>>>>
>>>>
>>>
>>
>
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